The 7th and 10th kings of Arthedain (LotR/1038). The initial element of this name is the prefix ar(a)- “noble” and its final element is probably the lenited form geleb of celeb “silver”.
Conceptual Development: In the draft of Appendix A of the Lord of the Rings, the name of Argeleb I was first given as Celebrindol, and the name of Argeleb II was first given as Arveleg (PM/209).
ar (prefix “high, noble, royal”) + #celeb (“silver”)